sql-server-2008 - 删除重复的观察和其他指定的行

Question

id     operation     age     shoesize
1        .            24        12
2        .            23        10
1        .            24        11   
3        R -          24         9
4        .            25       -9.5

我想删除重复的行、带有“R -”的行以及 shoesize<0 的行。

我在这里先向您的帮助表示感谢

Answer 1

假设id不能复制，您可以执行以下操作：

;WITH CTE AS
(
    SELECT  id,
            operation,
            age,
            shoesize,
            N = COUNT(*) OVER(PARTITION BY operation, age, shoesize)
    FROM YourTable
)
DELETE FROM CTE
WHERE N > 1
OR operation = 'R -'
OR shoesize < 0

如果id需要考虑重复，则：

;WITH CTE AS
(
    SELECT  id,
            operation,
            age,
            shoesize,
            N = COUNT(*) OVER(PARTITION BY id, operation, age, shoesize)
    FROM YourTable
)
DELETE FROM CTE
WHERE N > 1
OR operation = 'R -'
OR shoesize < 0

如果您只需要删除重复的行，并且想要保留其中的一行，那么您需要执行以下操作：

;WITH CTE AS
(
    SELECT  id,
            operation,
            age,
            shoesize,
            RN = ROW_NUMBER() OVER(PARTITION BY id, operation, age, shoesize ORDER BY id)
    FROM YourTable
)
DELETE FROM CTE
WHERE RN > 1
OR operation = 'R -'
OR shoesize < 0

Answer 2

delete from table_name
where operation ='R -'
or cast(shoesize as int)< 0

SQL小提琴

Edit

delete t1
from Table1 t1
inner join (select ROW_NUMBER()over 
(partition by id, operation, age, shoesize order by id, operation, age, shoesize) 
AS [row_id],* from Table1)t2
on t1.operation=t2.operation and t1.[age]=t2.[age] and t1.shoesize=t2.shoesize
where t2.row_id>1
or t1.[operation] ='R -'
or cast(t1.shoesize as int)< 0

SQL小提琴